Focusing on metal-impregnated carbon materials

the tribological properties and the current-carrying quality of metal-impregnated carbon materials were investigated on the HST-100 current-carrying friction tester under different friction conditions. The results reveal that the velocity has dominant influence on the current-carrying friction properties. When the threshold value of 70 m/s is exceeded

the current-carrying quality and tribological properties of the friction pair materials are significantly reduced

where the average current-carrying efficiency is reduced from 98% to 67.8%

and the average current-carrying stability is reduced by 83%

and the average wear rate is increased by 510%. Microstructure observations show that the proportion of the metal film is decreased and the proportion of the carbon film is increased gradually

so the current-carrying quality and the tribological properties are decreased gradually with the increase of the velocity and the current. In the process of current-carrying friction

the current-carrying quality and tribological properties are interplayed. Following the friction pairs with higher current-carrying quality

the good tribological properties are presented

which is conducive to improving conductivity and reducing wear.